Elevator-lock.



No. 778,550. PATENTBD DEG. 27, 1904. R. J. ROULO.

ELEVATOR LOCK.

APPLICATION FILED 06129. 1903.

Z SHEETS-SHEET 1.

No. 778,550. PATENTED DBO. 27, 1904..A

R. J. ROULU.

ELEVATOR LOCK. I

APPLICATION FILED 00T. 29,'1903.

2 SHEETS-SHEET 2.

UNITED STATES Patented December 27, 1904:.

PATENT OEETcE.

ELEvAToR-LOGK.

SPECIFICATION forming part of Letters Patent No. 778,550, dated December27, 1904.

Application filed October 29,1903. Serial No. 179,072.

To all whom it may cm1/cern:

Be it known that I, RICHARD J. ROULO, a citizen of theUnited States`residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented new and useful Improvements in Elevator-Locks,of which the following is a specification.

My invention relates to means to lock the doors of elevator-shafts andelevator-cages from being' opened except when the elevatorcage is at theproper landing and when the elevator-door is opened to locl theelevatorcage against movement until the door is again closed; and theobject thereof is to provide a simple and eflicient device for thatpurpose which will work automatically. I accomplish this object by themechanism described herein, and illustrated in the accompanyingdrawings, in which` Figure l is a perspective view of the top part of anelevator-shaft, partly prolen away, with an elevator-cage thereinequipped with my locking devices. Fig. 2 is a side elevation of thecable-lock; and Fig. 3 is an edge view of the lool; with fragments ofthe cage shown insection.

In the drawings I have illustrated the elevator-shaft A as being'provided with a sliding door B, at the landing of which C is a sill onthe level of the floor of the building. (Not shown.) At the landing issecured a rockbar I), which is rotatively mounted in bearings E, securedto the frame of the elevatorshaft. One end of this rock-bar is providedwith a locking-arm D, and the other end is provided with a rocking armD, which is adapted to be engaged by a shoe F, adjustably secured uponthe side of the elevatorcage H upon the movement of the cage either upor down the shaft whenever the bottom of the cage is at a landing, andthereby cause the rotation of the rock-shaft to withdraw the locking-armD/ from behind the door, and thereby permit the door to slide in itsbearings in the frame to open it. On the inner side of the door issecured the locking-bar J, which when the door is moved to open the exitfrom the elevator engages with the end of lever K, which is pivoted inbearings L,

affixed to the cage. The outer end of this lever passes through anopening M in the side of the cage. Pivotally secured to the inner end ofthis lever is a rod N, having its other end pivotally secured to theupper end of bar O, which bar is pivoted intermediate its ends inbearings P, afxed to the cage. The lower end of this bar is connected byrod R with bell-crank lever S, which is pivotally connected to the sideof the cage at T. The long arm S of the bell-crank lever is pivotallyconnected at U to a tube V, through which passes the operating rope orcable which controls the mechanism which moves the cage. The upper endof this tube passes through a guide X. This locking mechanism is solocated on the side of the cage that the part of the cable grasped bythe hand of the operator to control the movement of the cage is situatedjust above the top of the tube V. Now when the elevator-cage is at alanding in proper position with the door unlocked the movement of thedoor causes the locking-bar thereon to engage with the projecting end oflever K and carries the same backward and pushes it into the slot M,thereby through connecting mechanism causing the tube V to be thrownupwardly on the operating-cable VW and inclosing the same at the spotwhere the hand usually grasps said cable, thus preventing the operatorfrom moving the cable to start the cage until the door is closed. l/Vhenthe door is closed, spring Y, secured to the cage at the back of thelower end of bar O and bearing against the same, returns the bar to theposition shown'in Fig. 2, and thereby through connecting mechanismreturns the tube V to its normal position, as

shown in Fig. 2, so that the cable may be grasped by the hand of theoperator. If desired, a tube Z (shown in Fig. 1) may be attached to thetop of the cage and extend downwardly therefrom and around theoperating-cable l/V to the point at which the upper end of tube Vreaches when the door is open. This would render it impossible for thecable to be moved to start the cage until the door was closed. As soonas the cage leaves the landing spring a on the rock-shaft causes itsrotation to bring the locking-arm behind the edge of the door to preventits being opened.

It will thus be seen that with an elevator equipped with my lockingdevices and operated as described it is impossible for an acaccident tooccur by reason of the stoppage or starting of the elevator-cage, as thedoor is always securely locked while the elevatorcage is in motion, andwhen the elevator-cage is at rest at the proper landing and the dooropened it is imposible to start the cage in motion until the door isclosed.

Having described my invention, What l claim as new, and desire to secureby Letters Patent, is-

1. The combination of an elevator-cage; an elevator-shaft having asliding door at the landing thereof, said door having a locking'- bar onthe side adjacent to the cage; a lever pivotall y secured intermediateits ends to the side of the cage and having the outer end thereofpassing' through a slot in the side of the cage, said outer end beingadapted to lie in the path of the locking-bar of the slidingI door whensaid door is opened and to be pushed back into said slot thereby; a barpivotally secured intermediate its ends to the said cage; a rodpivotally connected to the upper end of said bar and to said lever; abellcrank lever pivotally secured to said cage in front of said bar; arod pivotally connected to the lower end of said bar and to the shortarm of said bell-crank lever; an operating-cable passing through saidcage adapted to control the mechanism by which said cage is operated;and a tube surrounding said cable and pivotally connected to the longarm of said bell-crank lever.

2. The combination of an elevator-cage having a slot in the sidethereof; a lever pivotally secured to the said cage and having the outerend thereof passing through said slot and into the path of the movementof the door which controls admission into said cage; a bar pivotallysecured intermediate its ends to said cage; a rod pivotally connected tothe upper end of said bar and to said lever; a bell-crank leverpivotally secured to said cage in front of said bar; a rod pivotallyconnected to the lower end of said bar and to the short arm of saidbell-crank lever; an operating-cable passing through said cage adaptedto control the mechanism by which said cage is operated; a tubesurrounding said cable and pivotally connected to the long arm of saidbell-crank lever; and an elevator-shaft having a sliding door at thelanding thereof, said door having a locking-bar on the side adjacent tothe cage` 8. The combination of an elevator-shaft, a door therefor; anelevator-cage having` a doorshaped opening' adapted to register with theelevator shaft door and affording ingress thereto and egress therefrom.when the door of the shaft is open; an operating-cable passing throughsaid cage, said cable being adapted to control the mechanism by whichsaid cage is operated; a tube surrounding said cable below the point atwhich the same is grasped by the operator when running the elevatorcage;means to cause said tube to pass upwardly on said cable when the dooraffording ingress to the elevator-cage is opened; and

means carried by said door to operate said tube-raising mechanism,

ln Witness that l claim the foregoing I have hereunto subscribed my namethis 23d day of October, 1.903.

RICHARD J RGUL'U. Witnesses:

Gr. E. HAnrHAu, MARGARETE C, NleKuLEsoN.

